Palladium-based catalyst is the most active fully oxidized material.

There is excess oxygen in methane. Structural and chemical characteristics

Species, currently on the surface, these substances have a decisive influence.

Their specific activities and time-dependent behaviors. Due to the structure and

The composition of these substances depends largely on preparation, pretreatment,

Thermal history and reaction conditions, various specific activities.

Available. The observed differences of several orders of magnitude are

The literature compares similar materials to illustrate this concept. With other people

Variables are constantly changing, flight time generally increases, and particle size. This particle size

This effect may be indirect, because smaller particles have stronger interaction.

And support. Highly dispersed PDO species, interaction and support, have

PDO clusters with much lower methane combustion activity. The reason behind it

PDO species with low activity and high dispersion can be linked to palladium -0 bond.

The intensity, in turn, increases with the decrease of PDO cluster.

Planning-0 bond also has different degrees of palladium oxide. exist

During methane combustion reaction, the catalyst surface is in a non-equilibrium state, and the kinetics

Controlled structure. Results of oxygen concentration distribution in particles

Keywords combined particle reconstruction, oxygen adsorption, mass diffusion,

And oxygen removal. This concentration distribution is different as a function of time,

Due to the increase of oxygen content, the bonding strength of palladium -0 decreases. This has increased

With the increase of some activities. The most widely accepted

The reaction pathway is the redox mechanism of Mars and Van krevelen, including